British Dictionary definitions for latch

latch

/ (lætʃ) /

noun

a fastening for a gate or door that consists of a bar that may be slid or lowered into a groove, hole, etc

a spring-loaded door lock that can be opened by a key from outside

Also called: latch circuitelectronicsa logic circuit that transfers the input states to the output states when signalled, the output thereafter remaining insensitive to changes in input status until signalled again

verb

to fasten, fit, or be fitted with or as if with a latch

Word Origin for latch

Old English læccan to seize, of Germanic origin; related to Greek lazesthai